THE SOFT-X-RAY BACKGROUND AND GALAXY CLUSTERS

被引:7
作者
BURG, R
CAVALIERE, A
MENCI, N
机构
[1] SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218
[2] UNIV ROME,DIPARTIMENTO FIS 2,I-00133 ROME,ITALY
关键词
COSMOLOGY; THEORY; GALAXIES; CLUSTERING; X-RAYS;
D O I
10.1086/186742
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We show that the background flux observed in X-rays around 1 keV sets a tight upper limit to the evolution of X-ray-emitting clusters of galaxies, once the contribution of the sources now resolved is subtracted. Specifically, if the clustering proceeds up a scale-invariant hierarchy in a critical universe, the intracluster gas content must increase faster than the dynamical mass. We model such evolution in terms of infall of the intergalactic medium into the hierarchically growing potential wells, limited by the intergalactic temperature. Thus the soft X-ray background provides constraints to the dynamical clustering and to the history of the intergalactic medium, which extend those being provided by the z-resolved luminosity functions in X-rays and complement those expected from measuring the Comptonization parameter in the microwave and far-IR bands.
引用
收藏
页码:L55 / L58
页数:4
相关论文
共 42 条
  • [1] Abell G. O., 1958, ASTROPHYS J SUPPL S, V3, P211
  • [2] BAHCALL NA, 1988, ANNU REV ASTRON ASTR, V26, P631
  • [3] THE STATISTICS OF PEAKS OF GAUSSIAN RANDOM-FIELDS
    BARDEEN, JM
    BOND, JR
    KAISER, N
    SZALAY, AS
    [J]. ASTROPHYSICAL JOURNAL, 1986, 304 (01) : 15 - 61
  • [4] THE CONTRIBUTION OF GALAXY CLUSTERS TO THE SOFT-X-RAY BACKGROUND
    BLANCHARD, A
    WACHTER, K
    EVRARD, AE
    SILK, J
    [J]. ASTROPHYSICAL JOURNAL, 1992, 391 (01) : 1 - 15
  • [5] GALAXY FORMATION BY DISSIPATIONLESS PARTICLES HEAVIER THAN NEUTRINOS
    BLUMENTHAL, GR
    PAGELS, H
    PRIMACK, JR
    [J]. NATURE, 1982, 299 (5878) : 37 - 38
  • [6] BURG R, 1992, ASTRON ASTROPHYS, V259, pL9
  • [7] BURG R, 1993, UNPUB APJ
  • [8] MERGERS AND BIAS IN A COLD DARK MATTER COSMOLOGY
    CARLBERG, RG
    COUCHMAN, HMP
    [J]. ASTROPHYSICAL JOURNAL, 1989, 340 (01) : 47 - 68
  • [9] CAVALIERE A, 1991, ASTRON ASTROPHYS, V245, pL21
  • [10] EDDINGTON RATIOS AS A CONSTRAINT ON THE ACTIVITY PATTERNS OF THE ACTIVE GALACTIC NUCLEI
    CAVALIERE, A
    PADOVANI, P
    [J]. ASTROPHYSICAL JOURNAL, 1988, 333 (02) : L33 - L36